Portable container for liquids



Feb. 28, 1961 B. o'c. PARKER PORTABLE CONTAINER FOR LIQUIDS 3Sheets-Sheet 1 Filed April 15, 1957 Feb. 28, 1961 B. o'c. PARKERPORTABLE CONTAINER FOR LIQUIOs 3 Sheets-Sheet 2 Filed April 15,- 1957 B.OC. PARKER PORTABLE CONTAINER FOR LIQUIDS Feb. 28, 1961 3 Sheets-Sheet 5Filed April l5, 1957 /I- f@ f5 hired The invention is concerned with aportable container for shipping and storing flowable bulk materials incomparatively large quantities. Various features and characteristicsrender the container advantageous for somewhat general use, includinguse for bulk powdered or granular materials, but as embodying an innerplastic bag element it is particularly useful as a container forliquids.

A commercially practical container must meet various diticult problemsand conditions including factors of cost in initial manufacture andshipping, space occupied in proportion to the liquid quantity,compliance with railroad and government regulations and other con-lditions. Powdered or granular materials have been shipped to a largeextent in multi-wall paper bags sizes 50 to 10() lbs. capacity. In manycases these are moved and shipped individually, but in attempts to gaingreater handling efficiency they are frequently placed on pallets andmoved in groups which, however, requires the expenditure of considerabletime and labor in lilling and emptying the bags and securing them on thepallets by various means such as steel strapping or by gluing. `Inefforts to avoid the disadvantages of bags such containers as spiralwound paper drums, steel drums, and barrels have been resorted to butthese also have their disadvantages including factors of cost, andineiicient use of space due to the cylindrical shape. In the case ofliquids a common type container heretofore employed for the purpose hasbeen the steel drum utilized in Various sizes of which the approximately55 gallon capacity is in the intermediate range and probably the mostcornmonly used. The initial costs of such type drums are relatively highand economical considerations therefore require that they be reused withconsequent delays and inconveniences, and added costs for returnshipment.

It is an object of the present invention to provide a container whichmeets the requirements in a practical manner and which includes thefeatures of being light weight but of adequate strength and of such lowinitial cost as to render them expendable, that is of one-time use whereconditions 'make it desirable. The construction embodies the features ofan outer shell of light weight paperboard material such as corrugatedpaper and, in the case particularly of liquids, an inner container inthe form of a bag of thin flexible plastic material such aspolyethylene. The functions of strength and liquid barrier, which arenecessarily combined in one metal wall in the case of a steel drum, inlthe present case are sepa` rately provided. The outer shell ofpaperboard is designed and shaped, in such a manner yas to provideadequate strength and retain the initial shape; and the liquid barrieror container can therefore be made of light weight plastic material andadapted to conform fully with the shape of the outer strength providingshell. A suitable flexible inner liner may also be employed in the caseof powdered material where circumstances make it desirable.

An important feature of the invention comprises the rares Parent icernanner in which the paperboard materials are initially shaped andthereafter assembled to result in a light weight but exceptionallystrong container adapted to cope with the forces normally exhibited byconfined liquid or other owable materials. The relation of the partsenables the container to be made of polygonal shape in horizontalsection, such as square shape, and retain that shape against the normaltendency of liquid to cause the confining container to assume agenerally round shape. The square shape is of considerable advantage ininitial fabrication and in handling and storage, and makes for economyof space since it eliminates the voids necessarily resulting betweencontainers of barrel shape. The present container has the advantagesthat in the initial manufacture the parts may be stamped out and scoredin at blank form and shipped to the user in quantities in suchknocked-downform and thereafter readily assembled by the user as neededby simple operations.

The construction includes various elements and features which contributeto the strength and rigidity and general practicability and which willbe described or made apparent from a consideration of the particularexamples exemplifying the invention hereinafter described. Certaincombinations and features covered herein are disclosed in my priorapplication Serial No. 631,619, tiled December 3l, 1956, now abandoned,of which this application is a continuation-in-part.

For a fuller understanding of the nature and objects of the inventionreference should be had to the following detailed description taken inconnection with the accompanying drawings, in which:

Fig. 1 is a View in perspective of one form ofra complete assembledcontainer representative of the invention;

Fig. 2 is a view in perspective of the outer shell in erect conditionbut not assembled;

Fig. 3 is a view in perspective of one form of interliner;

Fig. 4 is a View in lperspective of the top cover in at blank form priorto folding into shape;

Fig. 5 is a similar view of the bottom pyramidal interliner;

Fig. 6 is a vertical cross sectional view of the assernbled containertaken on the line 6-6 of Fig. 1;

Fig. 7 is a horizontal cross sectional view taken on the line 7-7 ofFig. 6;

Fig. 8 is a perspective view in partially exploded form showing therelation of the shell and interliner and bottom'closure;

Fig. 9 is a fragmentary top view showing particularly the pouring spout;

Fig. 10 is a vertical sectional view taken on the line 10-10 of Fig. 9;

Fig. 1lis a fragmentary view showing the character of the preferred formof paperboard and may be considered as taken on the line 11-11 of Fig.3;

Fig. l2 is a fragmentary ihorizontal section in diagrammatic form of theouter sleeve and form of interliner pictured in Fig. 3 showing thedirection and distribution of the forces involved.

Fig. 13 is a vertical view of a section of another form of interlinerblank in flattened form;

Fig. 14 is a view in perspective of the complete interliner for thevertical walls embodying a pair of sections like that of Fig. 13 andshowing the pyramidal shape;

Fig. 15 is a view in perspective of a bottom pyramidal interlinersection adapted to be employed with the vertical wall interliners ofFig. 14; and

Fig. 16 is a top plan view of an assembled container embodying an outershell such as that shown in Fig. 2 and. interliners like those of Figs.14 and 15. n

Referring now to the details ofthe particular container constructiondepicted in Figs. l'to 11 of the drawings, it

includes an outer main sleeve which in assembled form is rectangular inhorizontal cross section and for most purposes preferably square. In themanufacture thereof it may be a single continuous sheet with appropriatescore lines to form'the three corners and thefour panel sections, thetwo ends being suitably secured together at the fourth corner by anydesired practical means such as by providing an extension 11 andstapling it to the adjacent'panel of -the sleeve as indicated atV 11a.For shipment in knocked-down fashion the outer sleeve section may befolded down in flat form and a plurality thereof arranged in a stack.The shell blank includes apair' of opposed bottom flaps 12 and anotherpair 'of opposed bottom aps l13 depending from the respective panelsections 10a and formed by score lines, such as those indicated at 12aand 13a, and by cut out corners as indicated at 14.V The shell'alsoincludes a pair ofv opposed top flaps 15 and anotherpair of opposed aps16 formed as extensions of therespective panel sections 10a. In thiscase two spaced score lines are provided for each flap such asthoseindicated atl a to accommodate an intervening layer of paperboard whenthe flaps 15 are folded downwardly as indicated in Fig. 6 for exampleand as will be described more fully hereinafter.

The particular material of which the outer main sleeve 1,0 is composedmay vary dependent upon circumstances but paperboard is designated asparticularly practical for thel purpose. The paperboard .may be of anycommon l material suitable for that purpose and of standard thicknessand it is intended that lthe term paperboard include various types ofcomposition sheet material which are light weight and capable of beingVscored and folded in the manner indicated. It may comprise one ofvarious kinds of cellulose materials impregnated with plastic materialsor not impregnated, or it may comprise an appropriate plastic sheetmaterial and include if desired reinforcement. However, corrugatedpaperboard is particularly advantageous for the purpose since Vitprovides high-strength and rigidity relative to the weight andcost andthe corrugations or utes may be selectively arrangedso as to meet bestthe particular stressconditions, as Will be pointed out in more detailhereinafter.' A

A bottom interliner is shown particularly Vin initial unassembled formin Fig. 5 at 2.0.V As originally stamped out in at rform the blank has atriangular cut out 21 which may be at a corner but preferably is cut outfrom one of the side edges as shown. Thescore lines 22 lead kfrom anapex 23 to each of the four corners. The side edge portions 24 andV 25have 'a combined length equal to vone of thev other three edges assumingthat the particular container is generally square in shape withrequalsides. The edges, including the combined edge formed by the partialedges 24 and 25, are each slightly greater in length than the'innerywidth of a panel section 10a of the outer sleeve, and the scoring andgeneral proportions of the blank 20 are such that when the blank isfolded with the cut out portion 21 closed and the edges 24 and 25 becomeone continuous edge, the blank assumes a generally pyramidal shape asindicated for example in Fig. 6. This results in a distribution offorces in a particular manner and of particular advantage, as will bedescribed more fully below. Preferably the bottom member 20 is comprisedof corrugated paperboard and with the corrugations extending in thedirection indicated by the double arrowv26 in Fig. 5. The bottom closureis further formed -by folding inwardly at right angles to the outersleeve panels 10a, first the ilaps 13, and then the ilaps 12, andsecuring the parts in position by suitable means liner may Ibe made ofone continuous strip with appropriate score lines similarly to the outersleeve, or of separate individual sections, or a plurality thereof up tothe required number of four. As indicated particularly in Fig. 3, theinterliner is made of two sections each embodying two panel portions 31.The interliner is made of paperboard similarly to the outer sleeve andcorrugated paperboard is particularly advantageous. The width inhorizontal direction of each of the panel 'sections 31 is slightlygreater than the corresponding inner Width of the outer sleeve panelsection 10a and each section of the interlner is provided with avertical score line 32 located at substantially its mid portion wherebyVeach panel section of the interliner when assembled within the outersleeve 10 has a shape in the nature of a prismatic truss which in thevform being described is triangular in horizontal section as indicatedparticularly in Fig. 7. It will be noted that the vertical side edges 33of the truss are cornpressed intol the corners of the outer sleeve whenthe container is lled. The corrugations or utes 34 of the paperboard inthe interliner sections 31 are arranged preferably horizontally asindicated by the fragmentary vertical section of Fig. ll taken on theline 11,-11 of Fig. 3, and also as indicated by the double arrow 35 inFig. 3.

The particular container illustrated is rectangular in cross section andmore exactly is a square. It will be understood, however, that other atsided polygons such as a container of hexagonal shape in horizontalsection could be employed, in which case there would of course be six ofthe interliner panel sections 31.

The container may be used either for flowable powd ered' or granularmaterials or for liquids. An inner liner such as a flexible bag may beneeded for some powdered materials. The drawings illustrate thecontainer adapted for liquids and within the container and interiorly ofthe interliner 36 is located Va fluid receptacle in the for-m of aclosed bag 4u, the bag being comprised of suitable relatively strong butthin flexible plastic material. Polyethylene is particularly good forthe purpose. The bag is made of ample size and shape, and being of suchplastic material, when filled Vwith liquid it expands outwardly andclosely conforms to the interior shape of the container as a whole. Theliquid receptacle 46 includes a pouring spout or neck 41 suitablylocated and secured in the top portion thereof. As shown in largerproportions in Fig. l0 the spout comprises a length of rigid tubinginserted into a hole in the upper layer ofthe bag 49, the bag beingprovided with a circular lip or Vtube portion 42 extend-ing around thebottom end of the tube 4l and secured thereto by any suitable means suchas by cementing, and if desired additional securing means may beprovided in the form of wires 43 clamped around the sleeve portion 42.The spout 41 may have annular such as stapling 27 as indicated in Fig.6. The' botgrooves therein as shown into which the sleeve portion 42 iscompressed by the outer clamping rings 43. The spout 41 is provided witha suitable closure which may comprise a screw cap as indicated at ,44.

The spout 41 is adapted to beV slidably received in a main cover or topclosure 59 for t-he outer shell which will now be described in moredetail.. The cover is initially stamped out of a flat section ofpaperboard and as a blank has a shape corresponding to that indicated inFig. 4. The blank is generally square withportions adapted to form askirt comprising the sections 51 at each of the four sides defined byscore lines 52. A slit 53 is cut at each of the four corners to enableportions 51 to be folded down as a skirt and Vscore lines 54, denetriangular tab portions 55 adapted to be folded around over orunderneath the adjacent skirt portion and secured thereto as by stapling55 shown in Fig. l. Ex tending from each of the skirt portions 51 is atab 57 denedby spaced score lines 58 and 59. The cover has an opening 60Vtherein adapted to accommodate the pour ingspout 41 of the inner liquidcontainer. Preferably for .this purpose the opening 64) is madeconsiderably larger than the diameter of the spout 41 and a pair of dishshaped annular members 61 are secured in the opening 60 with the sheetmaterial of the top 50l clamped between complemental tlange portions 62of the dish shaped members 61. As a convenient manner of assembly andsecuring the dish shaped members in place, they may be provided with ascrew-threaded connection as indicated at 63, the lower member 61 havinga tubular threaded portion received in a threaded opening of the uppermember 61. The spout 41 is designed to have a relatively free sliding ntwithin the cover 50 and since the material of the bag 4t) is iiexiblethe spout 41 norrnally may be depressed to a position where the top ofthe cap 42 i-s flush with or below the upper surface of the member 50 asshown in full line in Fig. 6, or, for pouring or filling purposes, maybe lifted outwardly to the position shown in full line in Fig. and inbroken `line in Fig. 6. With the spout 41 pushed downwardly into thedepression, the containers may be stacked as indicated in Fig. 6 withthe complete container there shown sitting on another containerindicated in broken lines at 65.

ln securing the cover 50 on the container, the cover ymay be initiallyfolded and shaped into the form shown in Fig. l, except lwit-h the tabs57 remaining unfolded and extending downwardly. Before applying thecover to the outer sleeve 10 the flaps 15 and 16 of the sleeve are bentaround downwardly to the position shown, for example, in Fig. 6 and asindicated by the ap- 16' in Fig. 8. The cover 50` is then applied overthe outer sleeve 10 and the tabs 57 tucked inwardly and up to theposition shown in Fig. 6 and stapling applied as indicated at 57a inFig. 1. It will be noted that the tab 57 are of less length in thehorizontal direction than the skirt portions 51 and terminate somedistance from the respective corners, thereby to permit more readily thetabs to be tricked upwardly into the space between the correspondingflap or 16 of the outer sleeve 1G. The cover is thereby firmlyinterlocked with the sleeve 10 and if desired the container may belifted by hooking a tool under the lower edge of the skirt portion ofthe cap. Tools of that character are well known such as the chiselshaped element `66, indicated in broken line in Fig. 10, which may bemounted on a power fork lift.

The functioning of the container with respect to the resistance toforces imposed thereon when the container is kfilled with a ilowablematerial will now be described particularly in connection with Fig. 12.In the case of a liquid the container will include, of course, the innerfiexible bag. In a representative liquid container the dimensionsthereof may be such that the four panels of the outer sleeve 10 have awidth of about 2l inches and a height of about 34 inches. In the case ofpowdered or granular material the size would commonly be a littlelarger, as forexantple, about 35 inches wide and about 48 inches high.As has been indicated, the interliner panels have a total width inover-all flattened condition somewhat greater than the inside diameterof the outer sleeve 10 or, in other words, greater than the inner widthof a sleeve section 10a between the adjacent sections of thesleeve.Accordingly the interliner panel sections 31 will initially assume ashape somewhat as shown in Fig. 7. With respect to any selectedinterliner panel 31 such as. that diagrammatically indicated in Fig. 12the liquid container bag being flexible the result will be substantiallythe same as iff the liquid were acting directly on the interliner panel31 and there will be outwardly acting forces against the panel 31 asindicated by the arrows 70 and 71. The dimensions and relations may bevaried somewhat dependent upon particular circumstances, but in acontainer of the size and shape described above the apex A correspondingto the score line 32 of the panel 31 may be spaced initially from theouter shell wall 10a a distance of about 2 inches, or perhaps about -3 6inches if the container is on the larger order noted above for powderedmaterials. The forces 70 and 71 acting outwardly on the section 31 willtend to atten out the sheet to a shape and position indicated generallyby the broken line 31a and squeezing the side edges 33 into the cornersof the outer sleeve. The forces 70` and 71 create bending stresses `inthe horizontal direction in the interliner sections and forces 70 alsoproduce a component of compression acting in section AB as indicated byarrow 72. A resultant force is imposed on the outer sheet 10 at B atsome angular direction depending upon the circurnstances but indicatedgenerally by the line 73. The force 73 is counteracted by tension forces74 and 75 in the outer 'walls BC and BD respectively. Similar effectsoccur at each of the panels and at each of the corners.

The arrangement therefore makes exceptionally efficient use of thepaperboard material. The flutes of the corrugated paper of theinterliner panels are arranged horizontally and provide the maximumstrength to resist the bending and compression stresses. Furthermore theinterliner sections are in effect divided into two relatively narrowpanels each having a width extending from the' score line 32 or apex Ato the respective inside corner of the container. The horizontal forcesexerted on the panel sections of the outer sleeve are substantially alltension forces which the sheet material is well able to withstand.Accordingly the utes in the outer sleeve 10 may extend vertically andarranged therefore to withstand the maximum compression forces in thevertical direction and provide additional strength for stacking of thecontainers. The bottom flaps 12 and 13 being folded and arranged atright angles to the sides act as horizontal beams and contributesubstantially to the resistance to outward bowing of the sidesparticularly at the bottom where the pressure of the head of liquid isthe greatest. The container therefore retains its original square shapewith very little distortion. When the container is iilled with a fluid,that is a liquid or owable solid particles, the distance of the apex Afrom the outer wall will be reduced a small amount due to such factorsas compression of the edges 33I into the corners and the slightcompressibility in general of the material. In the example given Wherethe distance initially was 2 inches it would be reduced to about 11/2inches, and the total blank unoccupied space between the interliners 31and the outer shell would amount to not more than about 11%. However,the square containers can be arranged closely adjacent in storage orshipment and the 11% waste space is far less than the overall wastespace when cylindrical containers, for example, are employed.

The forces and resultant stress effects described above with respect toside pressures apply also to the conditions at the bottom ofthecontainer with respect to the bottom member 20. In fact Fig. l2 could beregarded as a vertical section taken through the bottom with the apex Ain Fig. l2 corresponding to the apex 23 of the pyramidally shaped bottommember 20 and the side edges 33 of Fig. 12 corresponding to the bottomside edges of the pyramid. The weight of the liquid inthe bag 49produces forces acting on the bottom 20 similar to those indicated at70` and 71 with a resultant 73 at the bottom edges of the outer shellsections 10a. The resultant force 73 is counteracted by horizontaltension forces in the sides and bottom flaps of the outer shell, and ofcourse by pressure from the supporting surface on which the containerrests. The sides and bottom of the container, therefore, in eectcomprise prismatic trusses having planar areas adjoining ones of whichmeet at an apex which projects inwardly of the container and functionsimilarly to a bridge truss as above described.

If the container is lifted by the top, for example, free of any bottomsupporting surface the vertical forces, comprising the weight of theliquid, are supported by tension in side walls of the shell. In thisrespect it may be noted that the weight of the liquid is transferred'through the pyramidally shaped bottom member to the bottom aps of theouter shell 10 immediately adjacent the vertical Wall sectionsk thereofand there is no substantial pressure exerted on the bottom apsthroughoutthe central horizontal area.

As# has been mentioned, among other advantages, the construction andrelation of parts enables the containers to be shipped in a compactsubstantially flat knockeddown form and easily and quickly assembled atthe point of use. As will be apparent from Figs. 2 to 5 inclusive, eachof the parts may be shipped in at formV and with a plurality of likeparts arranged in a stack.

In the container construction thus far described the side interliner isof a simple geometric form, with a uniform triangular shape inhorizontal cross section. Various other prismatic truss shapes may beemployed which also function similarly to a bridge truss. In Figs. 13,14 and 16 an interliner for the sides of pyramidal shape is shown. As inthe previous form the interliner may be made as a separate panel foreach side or with a plurality of panels connected together.Advantageously the interliner is made of two like sections 80 and 81each of two panels 82. Fig. 13 shows the section 80 in attened form andprovided with score lines at 83 and 84 and with a cut out triangulararea 85. The shape and proportions of the panels areV such with relationto the outer sleeve panels that when the interliner panels are squeezedinto Vplace between the corresponding sides of the outer shell laterallyand between the top and bottom closures vertically, they assume apyramidal shape as indicated in Fig. 14, with the triangular gap 8Scompletely closed. Each panel is comprised of four atrplanes or planarareas which are inclined inwardly from the outer shell and adjoiningpairs of planar areas meet in an angle of less than 180 at a common peakline or apex defined by the respective score lines 83 and 84 which inturn meet at acomrnon point apex 86. Each section preferably is providedwith a ap extension 87 at one side adapted to overlap the inner surfaceof the adjoining'panel 82 of the other section as indicated particularlyin Fig. 16.

The bottom interliner section 88 is likewise of pyramidal shape and maybe formed similarly to the bottom member 20 shown in Fig. 5. In Fig. 15the blank is shown compressed into the ultimate pyramidal shape.Y

The side interliner sections and the bottom interliner section of theform of container of Figs. 13 to 16 may be made of various materials asindicated in connection with the previous form but corrugated paperboardis particularly advantageous and the utes in such case are arranged asindicated by the arrows 89` for the vertical panels, and as indicated at90 for the bottom section.

The outer sleeve or shell of the complete container may be like theshell 1d of Figs. 1 and 2, and the cover or top closure may be like thatof Figs. 1` and 4 including the provision for the pouring neck of aninner bag where one is employed.

Fig. 16 is a top plan view looking down on a complete assembledcontainer except the cover has not been applied and the iiaps and 16 ofthe outer shell 10 are turned outwardly into horizontal position. Theassembly may of course include an inner exible liner.

It should be noted that Vthe interliner sections all comprise prismatictrusses and function similarly to a bridge truss. The planar areasYconjointly make up a complete enclosure and have contiguous outer edges.Pres# sures on the interior are transferred through the planar areas ofthe panels to the outer edges which engage along lines comprisingthevertical corners of the'outer sleeve and similarly at the bottom andVtop. TheV forces in the interliner including the bottom interliner arefor the most part compression forces with` some bending stresses.Therbottom edge of each panel section `82 has a full line engagementwith theouter shell and the pressure because-ot the static head of thecontents is a maximum along that line and normally would tend vto bowout- Wardly the sides of the outer shell, but the bottom tiap portionsof the outer shell being bent around into horizontal position provide abeam construction and the maximum resistance at that region todistortion from the rectangular shape of the container.

The interliners may be comprised of various other relations of planarareas arranged in prismatic truss form and adapted to function similarlyto bridge or roof trusses. For example the upper portion of the panelsection could be similar to the upper portion of the panels 82 and thelower portion similar in shape to that of the panels 31 of Fig. 3, thatis of continuous triangular shape in horizontal section from the apexpoint 86 downwardly. The same type of panel section could be employedreversed end for end with the split portion characterized Y by the notch85 in Fig. 13 arranged at the bottom.

Various changes may be made in the particular constructions describedherein without departing from the scope of the invention, and it isintended that all matter contained in the above description or shown inthe accompanying drawings shall be interpreted as illustrative and notin a limiting sense.

I claim:

1. A container comprising an outer sleeve of sheet material having apolygonal shape in horizontal cross section with vertical wall sections,said sleeve having bottom flaps folded inwardly, and a bottom part forsaid container folded and arranged in a generally pyramidal shape havingan apex at substantially the center of a horizontal section of thecontainer with a portion sloping downwardly and outwardly from the apexto each of said wall sections and each said portion having an outerbottom edge substantially coextensive with the inner width of thecorresponding wall section and positioned over the corresponding iaparea.

2. A container comprising an outer sleeve of paperboard shaped andproportioned substantially as a square in horizontal cross section withvertical wall sections, said sleeve having bottom aps folded inwardly,and a bottom part for said container folded and arranged in the form ofa pyramid having an apex at substantially the center in horizontal planof the container with a triangularly shaped portion sloping downwardlyand outwardly from the apex to each of said Wall sections and having anouter bottom edge substantially coextensive with the inner width of thecorresponding wall section and positioned over the corresponding aparea.

3. A container comprising an outer sleeve of sheet material having apolygonal shape in horizontal cross section with Vertical wall sections,each section having a bottom flap folded inwardly at right angles to thesection. and a bottom part of sheet material folded and arranged in agenerally pyramidal shape with a flat portion sloping downwardly andoutwardly to each of said Wall sections each of said portions having aside edge substantially coextensive with the inner width of thecorresponding wall section and positioned over the said flap of saidsection.

l4. A container comprising an outer sleeve of paperboard with verticalwall sections and of rectangular shape in horizontal cross section, areinforcing interliner within said sleeve embodying a panel section ofpaperboard located adjacent each outer wall section each said panelsection being scored along a vertically extending line at its midportion and spaced inwardlyzat said mid portion from the correspondingwall of the outer sleeve, the portions at each side of said mid portionbeing inclined toreach other and having a vertical side edge engagedinto the corresponding spaced corner of the outer sleeve, and a bottompart for said container of paperboard folded and arranged in a generallypyramidal shape with a portion extending downwardly and outwardly fromthe center to each of said wall sections and having a bottom outer edgesubstantially coextensive with the width of the corresponding Wallsection.

5. A container comprising an outer sleeve of paperboard with verticalwall sections and of polygonal shape in horizontal cross section, areinforcing interliner within said sleeve embodying a panel section ofpaperboard located adjacent each outer wal-l section each said panelsection being comprised of planar portions joined at score lines andinclined outwardly from a mid portion of the panel, said mid portionbeing spaced inwardly from the corresponding wall section of the outersleeve, the panel having vertical side edges each engaged into a cornerbetween wall sections of the outer sleeve, a bottom part for saidcontainer of paperboard folded and arranged in a generally pyramidalshape with an upwardly extending peak at substantially the center ofsaid part and a planar portion extending downwardly and outwardly fromsaid peak to each of said wall sections and each planar section having abottom outer edge substantially coextensive with the width of thecorresponding wall section, and an inner bag unit of flexible plasticmaterial adapted to hold liquid and of a size and character to flexfreely into engagement with the inner surfaces of said interliner andsaid bottom part.

6. A container of polygonal shape in horizontal cross section with flatvertical wall sections, a bottom closure therefor, and a top closure,said wall sections each having an extension bent outwardly anddownwardly into substantially parallel relation with the main wallsection, and said top closure including downwardly bent skirt portionsat each side wall section with tabs at the ends of certain skirtportio-ns at least overlapping and secured to the end of an adjacentskirt portion to form closed corners and a continuous skirt portionaround the top, and a narrowed tongue extending from each skirt portionwith its ends spaced a considerable distance from the corresponding endsof the skirt portion at the corners said tongue being adapted to betucked upwardly between the corresponding wall section and its saiddownwardly bent extension.

7. A container for liquids comprising -an outer sleeve of paperboard andof polygonal shape in horizontal cross section with ilat vertical wallsections, a bottom closure, a top closure of paperboard, a reinforcinginterliner within said sleeve embodying a panel section located adjacenteach outer wall section, each said panel section having a width inflattened condition greater than the width of the corresponding wallsection of the outer sleeve, and in assembled position having its midportion spaced inwardly from the outer Wall with its vertical edgesengaged into the corresponding spaced corners of the outer sleeve, andan inner bag unit of flexible material adapted to hold liquid, a spoutsealed into an opening in the top of said bag and adapted to extendupwardly through said top closure, said top closure having a generallycup shaped depression extending below the upper surface thereof with anopening through which said spout extends in slidable relation therewith,said spout being adapted selectively to be pulled upwardly beyond theupper surface of said top closure or pushed down into said cup shapeddepression.

8. A container for liquids comprising an outer sleeve of paperboard andof rectangular shape in horizontal cross section with flat vertical wallsections, a bottom closure, a top closure of paperboard, a reinforcinginterliner within said sleeve embodying a panel section located-adjacent each outer wall section, each said panel section beingcomprised of corrugated paperboard with the corrugations arrangedhorizontally and each being scored along a vertically extending line atits mid portion and having a width in tlattened condition greater thanthe width of the corresponding wall section of the outer sleeve, and inassembled position having its vertically extending mid portion at saidscore line spaced inwardly from the outer wall with its vertical edgesengaged into the corresponding spaced corners of the outer sleeve,

and an inner bag unit of flexible material adapted to hold liquid, aspout sealed into an opening in the top of said bag and adapted toextend upwardly through said top closure, said top closure having agenerally cup shaped depression extending below the upper surfacethereof with an opening through which said spout extends in slidablerelation therewith, said spout being adapted selectively to be pulledupwardly beyond the upper surface of said top closure or pushed downinto said cup shaped depression.

9. A container having an outer enclosing shell of paperboard including aplanar wall section polygonal in shape, and an inner reinforcing panelsection of paperboard adjacent said wall section, said panel sectionbeing comprised of a plurality of triangular portions each with a baseedge adjacent to and substantially co-extensive with one edge of thewall section and inclined inwardly of the container the triangularportions meeting at a common inwardly projecting point to form apyramidally shaped panel.

10. A container having an outer enclosing shell with vertical planarwall sections, andan interliner with a panel section adjacent each wallsection, each panel section being comprised of triangular planarportions each being inclined inwardly from an outer base edge of thetriangle and the portions meeting at a common inwardly projecting pointto form a pyramidally shaped section.

11. A container comprising an outer shell of paperboard polygonal inhorizontal cross section with vertical wall sections, and an interlinerwith a panel adjacent each wall section, each panel being comprised oftriangular planar portions, each portion being inclined inwardly from anouter base edge of the triangle arranged at the outer shell section andthe portions meeting at a common inwardly projecting point, adjacentplanar portions being joined laterally along a preformed score line andarranged at an angle to each other, said panels thereby being eachgenerally shaped in the form of a pyramid.

12. A container comprising an outer shell of paperboard polygonal inhorizontal cross section with vertical wall sections, an interliner withapanel adjacent each wall section, each panel being comprised oftriangular planar portions, cach portion being inclined inwardly from anouter base edge of the triangle arranged at the outer shell section andthe portions meeting at a common inwardly projecting point, adjacentplanar portions being joined laterally along a preformed score line andarranged at an angle to each other, said panels thereby being eachgenerally shaped in the form of a pyramid, and an inner bag unit offlexible material adapted to hold liquid land to flex freely intoengagement with the inner surface of said interliner.

13. Acontainer comprising an outer sleeve of paperboard with verticalwall sections and of polygonal shape in horizontal cross section withllat vertical sides, a reinforcing interliner withinsaid sleeveembodying a panel section of corrugated paperboard located adjacent eachouter wall section the corrugations extending in a horizontal direction,each said panel section being scored along a vertically extending lineat its mid portion and spaced inwardly at said mid portion from thecorresponding wall of the outer sleeve, the portions at each side ofsaid mid portion being inclined to each other and having a vertical sideedge engaged into the corresponding spaced corner of the outer sleeve,and an inner bag unit of exible plastic material adapted to hold liquidand of a size and character to ex freely and when lled with liquid toengage with the inner surface of said interliner throughout theperipheral extent.

14. A container having an outer shell including a planar sectionpolygonal in shape, and an inner reinforcing panel section locatedadjacent said planar section,

comprising a sheet of material of polygonal shape provided with scorelines extending radially outward from a 1 1 central point and dividingthe sheet into triangular planar areas with their apexes at said pointand each having a base located adjacent to and substantially coextensivewith one'edge of said planar section of the outer she'lL/and Y SchrfndtFeb' 27' i said sheet as preformed having a triangular cut-out open- 5'Y v vobmson "7""i`""l?ec` 1932 ing between two of said planar areaswith its apex at said 2f 6 61128 Riagg] IODVC 1 point, said planar areasbeing bent at an angle to each 2715980 Frick "'Aug. '23 other at therespective intervening score line and said 28'07402 Nelbac'h" Sept 24opening being closedwhereby the panel section has a generally pyramidalshape with a peak at said point and 10 FOREIGN PATENTS Great BritainNov. 5,

triangular sloping sides.

sir-5,721

References Cited in the'le of this patent UNITED STATES PATENTS

